Basin



FIG. 1 is a top plan view of a basin, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a perspective view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a rear side view thereof; and,

FIG. 6 is a left view thereof.

The broken lines illustrate portions of the basin that forms no part of the claimed design. 

CLAIM The ornamental design for a basin, as shown and described. 